
/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_RADIX_TREE_H_INCLUDED_
#define _NGX_RADIX_TREE_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>


#define NGX_RADIX_NO_VALUE (uintptr_t) - 1

typedef struct ngx_radix_node_s ngx_radix_node_t;

struct ngx_radix_node_s
{
    ngx_radix_node_t *right;
    ngx_radix_node_t *left;
    ngx_radix_node_t *parent;
    uintptr_t         value;
};


typedef struct
{
    ngx_radix_node_t *root;
    ngx_pool_t       *pool;
    ngx_radix_node_t *free;
    char             *start;
    size_t            size;
} ngx_radix_tree_t;


ngx_radix_tree_t *ngx_radix_tree_create(ngx_pool_t *pool,
                                        ngx_int_t   preallocate);

ngx_int_t ngx_radix32tree_insert(ngx_radix_tree_t *tree, uint32_t key,
                                 uint32_t mask, uintptr_t value);
ngx_int_t ngx_radix32tree_delete(ngx_radix_tree_t *tree, uint32_t key,
                                 uint32_t mask);
uintptr_t ngx_radix32tree_find(ngx_radix_tree_t *tree, uint32_t key);

#if (NGX_HAVE_INET6)
ngx_int_t ngx_radix128tree_insert(ngx_radix_tree_t *tree, u_char *key,
                                  u_char *mask, uintptr_t value);
ngx_int_t ngx_radix128tree_delete(ngx_radix_tree_t *tree, u_char *key,
                                  u_char *mask);
uintptr_t ngx_radix128tree_find(ngx_radix_tree_t *tree, u_char *key);
#endif


#endif /* _NGX_RADIX_TREE_H_INCLUDED_ */
